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Magnetism and Electromagnetism

Magnetism and Electromagnetism
If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage

decreases
increases
remains unchanged
reverses polarity

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Magnetism and Electromagnetism
Indicate which of the following material does not retain magnetism permanently.

Stainless steel
Soft iron
Hardened steel
None of the listed here

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Magnetism and Electromagnetism
Reciprocal of permeability is

Permeability
Reluctivity
Susceptibility
conductance

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Magnetism and Electromagnetism
A keeper is used to

Provide a closed path for flux
Restore lost flux
Change the direction of magnetic lines
Amplify flux

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Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

susceptance
permeance
reluctance
residual magnetism

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Magnetism and Electromagnetism
What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb?

6,000 T
600 T
600 T
6 T

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MORE MCQ ON Magnetism and Electromagnetism

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